seadoo xp 99 rpm missing

[Bill O'Neal2]

Re: seadoo xp 99 rpm missing

9.33 bars plus or minus .33 bars.

[mad mike]

Re: seadoo xp 99 rpm missing

huh ? thats the normal comp? I always have 11/12 bars on a new engine
i'm going to strip the engine again to se if I can find annything

[Bill O'Neal2]

Re: seadoo xp 99 rpm missing

9.33x15=140

A stock Sea Doo 951 pumps around 145 psi at sea level, measured with a calibrated Snap-On compression guage with a 19mm reach adapter.

[mad mike]

Re: seadoo xp 99 rpm missing

I have a good compression guage and it reads always on a new engine 11/ 12 bars
this engine is just 2 hours old and the comp is now 9.8 bars thats not normal
I'm going to take it apart when I'm done I wil let you know if I could find annything

[mad mike]

Re: seadoo xp 99 rpm missing

PS.
I use always prox pistons and the clearance I use is 0.12 mm for the prox pistons and wiseco pistons 0.10 mm